Shikaku


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Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial
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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

New Puzzle
This Month
1. coolcoolguy65
177
00:05.23
2. DBWwushen
14
00:05.88
3. Chen Jiakai
20
00:06.06
4. Yuyinraoliang_1
18
00:06.13
5. dbot
22
00:06.73
6. FxdeSlxyr
10
00:07.10
7. huohuo2004
42
00:07.22
8. qobi
239
00:07.27
9. elementz 00:07.51
10. daspore 00:08.13
11. hgh
70
00:08.43
12. cheesekurtz 00:08.57
13. HDXX123456789 00:08.70
14. llmt9
100
00:08.81
15. gadiboyo 00:08.88
16. geyik
217
00:08.92
17. GeorgPfleger
100
00:09.13
18. dbut2
41
00:09.64
19. dave dave
12
00:09.67
20. lennian123 00:10.29
This Week
1. huohuo2004
42
00:07.22
2. elementz 00:07.51
3. daspore 00:08.13
4. hgh
70
00:08.43
5. HDXX123456789 00:08.70
6. GeorgPfleger
100
00:09.99
7. lennian123 00:10.29
8. seabastian 00:11.01
9. wallickdeez
16
00:12.38
10. cyrex45
11
00:12.47
11. ciisq
6
00:12.82
12. Chalk
117
00:19.76
13. Radewoosh 00:20.15
14. yumeowww 00:23.77
15. djanna 00:42.94
16. ftbts
10
00:55.02
17. zzj0505 01:45.86
18. Uthor 13d 09:17:59.07
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MO3
1. zahhydude1
217
00:03.48
2. vowels
216
00:03.81
3. demian2
61
00:04.66
4. Vicellen
15
00:04.70
5. numbrr
321
00:04.92
6. coolcoolguy65
177
00:05.06
7. BingBongBob
108
00:05.15
8. JZE
88
00:05.16
9. nabi
92
00:05.27
10. mtanzer
140
00:05.34
AO5
1. zahhydude1
217
00:03.76
2. vowels
216
00:03.88
3. demian2
61
00:04.92
4. Vicellen
15
00:05.06
5. numbrr
321
00:05.32
6. BingBongBob
108
00:05.39
7. nabi
92
00:05.41
8. coolcoolguy65
177
00:05.44
9. bearn
206
00:05.55
10. JZE
88
00:05.75
AO12
1. zahhydude1
217
00:04.20
2. vowels
216
00:04.91
3. BingBongBob
108
00:05.84
4. coolcoolguy65
177
00:05.85
5. Vicellen
15
00:06.24
6. numbrr
321
00:06.26
7. demian2
61
00:06.31
8. JZE
88
00:06.39
9. bearn
206
00:06.41
10. nabi
92
00:06.91
Robots / programmatic solversinfo  
1.dbut2
41
00:00.003
2.tlstyer
151
00:00.006
3.Charlie Li
61
00:00.207

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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